Guitar headstock



FIG. 1 is a front, top perspective view of a guitar headstock showing mynew design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof; and,

FIG. 6 is a top plan view thereof.

The broken lines shown are for illustrative purposes only and form nopart of the claimed design.

The ornamental design for a guitar headstock, as shown and described.